"Invalid resource type" error in cloudshell_tutorial.md

We received a report from a user on step 4 of cloudshell_tutorial.md who got the error "Invalid resource type" when they ran the "terraform apply" command:

The provider provider.google does not support resource type "google_project_services".

Start with step 4 of cloudshell_tutorial.md and reproduce the reported failure by running terraform apply. Trace the google_project_services resource reference and update the tutorial so the documented step completes without the "Invalid resource type" error.

Written by the indexing model from the issue text.